Can you tell me how the dlood entering the right atrium differ fom the blood entering the left atrium?

Circulation of blood: Heart is a pump,that works non stop,to keep you alive,and is divide in two sections,rt,.and left,all your activities and production of. Carbon dioxide,is carried by veins,transported to rt. atrium,to rt ventricle,thence to lungs,which exchanges co2 for oxygen,and from lungs taken to left atrium,ventricle and to the rest of body,this cycle goes on,